Bag-turning machine.



D. F. STEIN.

BAG TURNING MACHINE.

APPLICATION FILED NOV. 14. 1914.

1, 140,627. Patented May 25, 1915.

4 SHEETSSHEET I.

D. F. STEIN.

BAG TURNING MACHINE.

APPLICATION FILED NOV. 14. 1914.

1 ,140,627. Patented May 25, 1915 4 SHEETS-SHEET 2.

Figb DEV/0 F 5/75.? I Inventor THE NORRIS PETERS CO. PHOTO-LITHO.. WASHINGTON. u.

D. F. STEIN.

BAG TURNING MACHINE.

APPLICATION FILED NOV. 14, I914.

1,140,627. Patented May 25, 1915.

4 SHEETSSHEET 3.

91710.0 27' ,Sns'r/v ventor Attorneys THE NORRIS PETERS 60., PHOTO-LITHQ, WASHINGTON D. c

D. F. STEIN.

' BA'G TURNING MACHINE.

APPLICATION FILED NOV-'14, I914.

Patented May 25, 1915.

4 SHEETS-SHEET 4- Witnesses: MZMQ Inventor Attorneys THE NORRIS PETERS CD., PHOTO-LITHO.. WASHINGTON, D. C.

, rrnn sTAT s PATENT orrrcn.

YQIDAVVID r. STEIN, or MONTREAL, QUEBEC, "CANADA.

BAG-TURNING MACHINE.

To all whom-it may-concern Be it known that 1, DAVID F. STEIN, a subject of the King of Great Britain, residing atNo. 26 St. Famille street, Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Bag-Turning Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention to be hereinafter described relates to bag turning machines.

In order to more clearly disclose the construction, operation, and use of the invention, reference should be had to the accompanying drawings forming part of the present application.

Throughout the several figures of the drawings like reference characters designate the same parts.

In the drawings: Figure 1 is a side view of the machine; Fig. 2 is atop plan view;

Fig. 3 is a section on line 3-8 of Fig. 2 looking in the direction of the arrows; Fig. 1 is a section on line le-4 of Fig. 1 looking down; Fig. 5 is a detail of the gearing for rotating the shaft on which the turning arms are mounted; Fig. 6 is a detall of an end portion of one of the arms; Fig. 7 is a detail side view of one of the gripping members; Fig. 8 is a detailof one of the bag holding uprights; Fig. 9 is a detail underneath view of one of the gripping members; Fig. 10 is a detail sectional view through one of the arms taken in back of one of the gripping members; Fig. 11 is a fragmentary sectional v arms showing the block for closing the gripping member Fig. 121s the same showing the block for opening the gripping member; Fig. 13 is anunderneath view of the block for closing the gripping member; and Fig. 1 1 is an underneath view of the block for opening-the gripping member.

The main objects of the invention are, to produce a neat, compact, efiicient, and ble and easily and quickly operated machine, of simple construction, for turning bags. This machine is specially adapted for use in factories for making cloth bags or sacks, and the like.

Referring to the ignates the base plate, is secured a pair of drawings in detail, 1 desat the center of which parallel standards 2 Specification of Letters Patent.

view of one of the duraportion 10 Patented May 25, 1915.

Application filed November 14, 1914.. Serial No. 872,271.

spaced a short distance apart. A transverse shaft 3 is rotatably mounted in the upper ends of standards 2 and projects slightly therebeyond, at each end. On each end of shaft 3 a four-armed securing plate 41 is secured, each arm of which is adapted to receive the inner end of one of the turning arms 5 which are secured therein by binding screws or other suitable means. Adjacent the inner face of each plate 4., a gear 6 is keyed on shaft 3, in-mesh with a second gear 7 keyed on a transverse shaft 8 rotatably mounted in standards. 2, in back of and below shaft 3. Shaft 8 is rotated by means of a gear 9, of special construction, to be later described, which is in mesh with a gear 10, also of special construction and mounted on a stud shaft secured in one of the standards, which is driven by an integral bevel gear 11 in mesh with a bevel gear 12 keyed on the inner end of a rotatably mounted shaft 13 provided with a pully 11 driven from any suitable source of power.

On the back portion of plate 1, a square table 15 is revolubly mounted on a standard 16, by means of a shaft 17 inserted through a suitable bore from the top of the table, and a collar 18 secured near the bottom thereof. A plate 19, in the form of a maltese cross with the outer ends ofits arms 'concaved in an arch, is keyed on shaft 17,

above collar 18. A plain gear 20 is keyed on the lower end of a shaft 21 rotatably mounted on the standard 16. This gear is provided, on its upper face, with a concentric rib 22 in the form. of a nearly closed circle, and a pin 23 located somewhat beyond the rib and at the center of the opening therein. The curvature ofrib 22 is such that it corresponds to the curvature of the arches in the arms of the plate 19.

Shaft '21 is rotated by means of a bevel gear 2 1 keyed on the upper end thereof and in mesh with the bevel gear 25 keyed on the end of shaft 13. As above stated, the gears 9 and 10 are of special construction, as

shown in Fig. 3. Gear 9. is provided, on its periphery, with a smooth, concaved, segmental portion 9 which is adapted to receive a somewhat longer segmental smooth ofgear 10. A pin 9 is secured to the gear 9, at the inner end of portion 9 and is adapted to be engaged by a finger 10 secured at the inner end of the segmental portion of gear 10. The teeth of gear 10 for every rotation of gear 10; and the ratio between gears 6 and 7 is 4 to 1, so that, for every complete rotation of gear 9 gear 6 is rotated one quarter. As the gear 9 is. stopped at each rotation, it is evident that gear 6 is stopped at every quarter rotation. In Fig. 3 the gear 9 is shown in stopped position. This gear remains stopped during the travel of the segment of gear 10 in the segment 9, as is obvious. As soon as finger 10? strikes pin 9 the gears are thrown into mesh and gear 9 is again rotated. At the same time that the operation just described is taking place, the plain gear 20 is being revolved. At every revolution of'gear 20 pin 23 is caused to engage one of the slots of plate 19 so as to turn it a quarter revolution, as indicated in Fig. 4:, after which the pin passes out of the slot'and the gear continues to revolve leaving the plate 19 at a standstill, as indicated in Fig. 2. The gears 9 and 20, and bevel gears 12 and 25, are of the same size so that plate 19, and consequently table 15, is turned a quarter revolution at the same time that gear 6 is turned a quarter revolution, and in synchronism therewith. I

The arms 5 secured in plates 1 are of tubular construction with slightly curved ends tipped with rounded headsor knobs, and are each provided with a slot in its outer side. A gripping .member' (Fig. 7) is 'slidably mounted in each arm 5 and is pivotally connected to the outer end of a rod 26 the inner end of which is loosely mounted about a stub shaft secured in the upper end of a frame 27 above and in back of shaft 3. As the shaft 3 rotates the gripping members are reciprocated back and forth in arms 5, as is evident from Fig. 1, in which the paths of travel of the arms 5 and of the outer ends of rods 26 are indicated.

The gripping member (Figs. 7, 9, and 10) consists of a block portion 28 slotted to receive an upper jaw29, and a lower jaw 30 integral therewith. The upper jaw 29 is pivotally mounted in block 28 and has its lower end extended so as to project a considerable distance into a slot formed in the under face thereof, the block being formed so as to snugly fit the interior of the arm 5, as in Fig, 10. Normally, the upper jaw is held raised by a coil spring '30 placed be tween the two jaws, as in Fig. 7. Near the outer end of arm 5, on the inner face thereof,

ablock 32 (Fig. 13), adapted to fit into the groove in the under face of block 28 of the gripping member, is secured. This block is of such a height as to engage and raise the lower end of jaw 29 of the gripping .member so as to close it against the action of spring 30, when the member has reached its extreme outermost position, which will 'tion. This frees be when arm 5 1s horizontal andi'n back of the stub shaft carried by frame 27. As

soon as the lower end of jaw 29 is raised,a

thin leaf spring 31 which is mounted in one side of block 28 edgewise and formed with a, spread portion or head, will pass beneath the lower end of the jaw so as to keep the grip closed, as indicated in dotted lines in Figs/7 and 9. I

A proper distance from block 32 in toward the inner end of arm 5 a second block 33 is secured. This block is somewhat lower than block 32and is adapted to engage the inner end of spring 31, as the gripping member nears its most retracted position, so" as to force it outwardly from beneath the lower end of jaw 29. When this happens, coil spring 3Q acts to lift the jaw and forces its lower end downwardly on the block, in

front of the inner edge of leaf spring 31. This prevents the leaf spring from passing beneath jaw 29 and thegripping member remains open. When the gripping member is again forced outwardly it passes over' block 33 without being in any way affected thereby. r

The operation is as follows: As the bag is taken from the machine, after seaming, wrong side out, it is placed'on the pair of U arms or holders 34: on one side of the table 15, with its upper portion turned down and secured by spring clips 35, as indicated by dotted lines in Fig. 1. When a pair of arms 5 come to the near horizontal position, the

curved ends thereof pass beneath the arms of the members 3 1 into the fold of the'bag and, at the same time, blocks 32, in the arms, act to'closethe gripping members so as to securely grip the edge of the bag. Asthe arms are rotated upwardly and forwardly the gripping members are retracted so as to draw the bag over the arms and thus turn it right side out. As stated, block 33 is placed in arm 5 so as to open the gripping member before it has reached its most retracted posithe bag entirely of the gripping member so that the operator can quickly remove it from the arms 5 by a simple pull. As the arms and the table stop for a short time at each quarter revolution the operator who is placing the bags on the table and the one who is removing them from the arms, both have suflicient time to do their work quickly and accurately.

It is thought that the construction, operatlon, and use of the invention will be clear from the preceding detailed description.

Changes may be made in the construction, arrangement, and disposition of the several parts of the invention without in any way departing from the field andscope of the same, and it is meant to include all such within this application wherein only a preferred form has been disclosed.

Having thus fully described my invention, What I claim as new and desire to secure by Letters Patent is:

1. In a machine of the character described, rotatably mounted turning arms, gripping members carried thereby, operating means therefor, means for rotating the arms, adapted to permit the said arms to stop at every quarter rotation, a revoluble table, bag holding means carried thereby, and means for revolving the table synchronously With the said turning arms.

2. Ina machine of the character described, rotatably mounted arms, gripping members slidably operative therein, operating means therefor, means for rotating the arms, adapted to permit the said arms to stop at every quarter rotation, a revolubly mounted table, bag holding means carried thereby, and means for revolving the said table adapted to permit the said table to stop after every quarter revolution synchronously With the said arms.

3. In a machine of the character described, rotatably mounted tubular arms, means for causing rotation thereof, adapted to permit the arms to stop at every quarter rotation, gripping members slidably operative in the said arms, means for extending and retracting the said members in the said arms, means for opening and closing the said gripping members, a revoluble table mounted in back of the said arms, bag holding means carried thereby, and means for Copies of this patent may be obtained for revolving the said table adapted to permit stopping of the same after every quarter revolution synchronously With the said arms.

4:. In a machine of the character described, a rotatably mounted shaft, tubular arms secured thereon, means for rotating the said shaft, adapted to permit stopping the same at every quarter rotation, gripping members slidably mounted in the said arms and adapted to be extended and retracted therein, rods having their outer ends pivotally connected to the said gripping members and their inner ends loosely mounted about a stub shaft located above and in back of the first mentioned shaft, means for closing each gripping member when it reaches its most extended position, means for opening the said gripping member at a point slightly in advance of its most retracted position, and a revolubly mounted bag holder adapted to receive the ends of the said arms, and means for revolving the said bag holder adapted to permit the said holder to stop at every quarter revolution synchronously With the rotating and stopping of the first mentioned shaft.

In Witness whereof I have hereunto set my hand in the presence of tWo Witnesses.

DAVID F. STEIN.

Witnesses A. PIZZAGOLA, A. BASTIEN.

five cents each, by addressing the Gommissioner of Patents,

Washington, I). G. 

